I'm most interested in what you hope to achieve through this and whether it accomplishes what you hope that it will. Are you looking at it as a photographer's social tool or as a means of gaining exposure for your images? Both? Or is it just for fun?

I view MySpace and Facebook as alternative email/IM/hookup mechanisms. My accounts are for those who prefer to message me through them rather than the more direct way. Of course, I'm too old to find them appealing in their own right. ;-)

Haha you'd be surprised then. I would say MySpace is used much more for that, but all social sites get used for that by those that are "young" enough to have it on the brain. I've been propositioned many times including on Facebook. Surely you've seen the Facebook apps for that...

In answer to craigs question .. I believe the reason why any person who tries to grab a bit of attention / lime light to sell themselves or their product online would be sorely out of place or at least time if they were not to use the new social network craziness to try and get a few new customers !

I also like that Eric is doing it the right way. facebook has the ability to do so much more than when it first started so there is no need to add someone as a friend or allow them to be your friend if you don't know them but you want them to see your photos, you can now share it all in groups or even pages that people can be fans of but not get to your more personal information or photos.
I think as a social site they are making some great moves in some interesting directions.